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Math

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If f(x)=x^5+2x+1, then (f^-1)'(4)=?

  • Math - ,

    (f^-1)(4) = 1

    (f^-1)'(4) = 1/f'(1) = 1/(5+2) = 1/7

    wikipedia has a good article under
    Inverse functions and differentiation

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